133303 has 2 divisors, whose sum is σ = 133304. Its totient is φ = 133302.

The previous prime is 133283. The next prime is 133319. The reversal of 133303 is 303331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133303 - 2⁵ = 133271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66651 + 66652.

It is an arithmetic number, because the mean of its divisors is an integer number (66652).

2¹³³³⁰³ is an apocalyptic number.

133303 is a deficient number, since it is larger than the sum of its proper divisors (1).

133303 is an equidigital number, since it uses as much as digits as its factorization.

133303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 13.

The square root of 133303 is about 365.1068336802. The cubic root of 133303 is about 51.0834210792.

Adding to 133303 its reverse (303331), we get a palindrome (436634).

The spelling of 133303 in words is "one hundred thirty-three thousand, three hundred three".